Épines (en. Thorns)
[epin]
Slang Meanings
Unexpected difficulty or obstacle.
This project has a lot of thorns on its path.
Ce projet a beaucoup d'épines sur son parcours.
A prickly problem that requires attention.
It's going to be complicated, there are thorns everywhere.
Ça va être compliqué, il y a des épines partout.